lib/drivers/sound/soundblaster/speaker.c

   1 /*
   2     ReactOS Sound System
   3     Sound Blaster DSP support
   4     Speaker commands
   5
   6     Author:
   7         Andrew Greenwood (silverblade@reactos.org)
   8
   9     History:
  10         2 July 2008 - Created (split from sbdsp.c)
  11
  12     Notes:
  13         Functions documented in sbdsp.h
  14 */
  15
  16 #include "precomp.h"
  17
  18 NTSTATUS
  19 SbDspEnableSpeaker(
  20     IN  PUCHAR BasePort,
  21     IN  ULONG Timeout)
  22 {
  23     return SbDspWrite(BasePort, SB_DSP_SPEAKER_ON, Timeout);
  24 }
  25
  26 NTSTATUS
  27 SbDspDisableSpeaker(
  28     IN  PUCHAR BasePort,
  29     IN  ULONG Timeout)
  30 {
  31     return SbDspWrite(BasePort, SB_DSP_SPEAKER_OFF, Timeout);
  32 }
  33
  34 /*
  35     VirtualBox doesn't seem to support this.
  36 */
  37 NTSTATUS
  38 SbDspIsSpeakerEnabled(
  39     IN  PUCHAR BasePort,
  40     OUT PBOOLEAN IsEnabled,
  41     IN  ULONG Timeout)
  42 {
  43     NTSTATUS Status;
  44     UCHAR SpeakerStatus = 0;
  45
  46     if ( ! IsEnabled )
  47         return STATUS_INVALID_PARAMETER_2;
  48
  49     /* Request the speaker status */
  50     Status = SbDspWrite(BasePort, SB_DSP_SPEAKER_STATUS, Timeout);
  51     if ( Status != STATUS_SUCCESS )
  52         return Status;
  53
  54     /* Obtain the status */
  55     Status = SbDspRead(BasePort, &SpeakerStatus, Timeout);
  56     if ( Status != STATUS_SUCCESS )
  57         return Status;
  58
  59     DbgPrint("SBDSP - SpeakerStatus is %02x\n", SpeakerStatus);
  60     *IsEnabled = (SpeakerStatus == 0xFF);
  61
  62     return STATUS_SUCCESS;
  63 }